<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding:0;
            margin:0;
        }
        li {
            list-style: none;
        }
        h1 {
            text-align: center;
        }
        a {
            text-decoration: none;
        }
        .lzq {
            position: relative;
            margin:0 auto;
            width: 400px;
            height: 585px;
        }
        .lzq .prev {
            position:absolute;
            left:0;
            top:50%;
            margin-top: -15px;
            border-top-right-radius: 15px;
            border-bottom-right-radius: 15px;
            width: 20px;
            height: 30px;
            background-color: rgba(0,0,0,.5);
            color:#fff;
            text-align:center;
            line-height: 30px;
        }
        .lzq .next {
            position:absolute;
            right:0;
            top:50%;
            margin-top: -15px;
            border-top-left-radius: 15px;
            border-bottom-left-radius: 15px;
            width: 20px;
            height: 30px;
            background-color: rgba(0,0,0,.5);
            color:#fff;
            text-align:center;
            line-height: 30px;
        }
        .lzq .prev:hover {  
            color:skyblue;
        }
        .lzq .next:hover {
            color:skyblue;
        }
        .lzq .promo-nav {
            position: absolute;
            bottom:10px;
            left:50%;
            margin-left: -35px;
            width: 70px;
            height: 13px;
            background-color: rgba(255,255,255,.3);
            border-radius: 7px;
        }
        .lzq .promo-nav li {
            float: left;
            margin:3px;
            width: 8px;
            height: 8px;
            background-color: #fff;
            border-radius: 4px;
        }
        .lzq .promo-nav li:hover {
            background-color: #ff5000;
        }
        .tudou {
            position:relative;
            width: 444px;
            height: 320px;
            margin:30px auto;
        }
        /* 使用伪类元素选择器完成遮罩效果 */
        .tudou::before {
            content:'';
            display:none;
            position:absolute;
            top:0;
            left:0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,.3) url(images/tv.png) no-repeat center;
        }
        /* 鼠标经过盒子，里面的伪类元素选择器就显示！！（重要） */
        .tudou:hover::before {
            display:block;
        }
        video {
            width: 444px;
        }
        audio {
            width:444px;
        }
    </style>    
</head>
<body>
    <h1>敬请期待!</h1>
    <div class="lzq">
        <img src="images/lzq6.jpg" alt="">
        <a href="#" class="prev">&lt;</a>
        <a href="#" class="next">&gt;</a>
        <ul class="promo-nav">
            <li></li>
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
    <div class="tudou">
        <img src="images/lzq7.jpg" alt="">
    </div>
    <video src="lzq.mp4" autoplay="autoplay" muted="muted" controls="controls" loop="loop"></video>
    <audio src="images/1.mp3" controls loop ></audio>
</body>
</html>